Shuttle of embroidering-machines.



R. ZAHN.

SHUTTLE 0F EMBROIDERING MACHINES.

APPLICATION FILED JAN. s, 1913. r

1,085,834. Patented Feb. 3, 1914.

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ROBERT ZAHN, 0F PLAUEN, GERMANY.

SHUTTLE OF EMBROIDERING-MACHINES.

To all whom it may concern Be it known that 1, ROBERT ZAHN, residing at Plauen, in Vogtland, in the Kingdom of Saxony, Germany, have invented certain new and useful Improvements in Shuttles of Embroidering-Machines, of which the following is a specification.

The present invention relates to shuttles and has for its object to improve the construction thereof.

With hitherto used shuttles the thread braking spring is oblong and extends longitudinally over the entire length of the shut tle cover or lid, which construction has the disadvantages that a fine and uniform control of the braking action thereof on the thread passing below the spring is impossible and furthermore that the cover has to be arranged at a certain depth in the shuttle in order to provide room for the projecting parts, as spring, thread brake or tension control arm, screw heads and rivets.

The object of my invention is to improve the shuttle by providing a spring that extends only over a portion of the length of the cover and that is curved in a circle corresponding to the path which the pivoted brake or tension control arm is capable of describing. By virtue of the construction, the said control arm, when turned for increasing or decreasing the brake action, on its entire path, slides and with full force acts on the spring, which allows of a fine and uniform control of the brake action of the spring.

To make my invention more clear, the same by way of example and more or less diagrammatically, is illustrated in the accompanying drawing, in which similar reference characters denote corresponding parts and in which- Figure 1 shows a top plan view of a shuttie and Fig. 2 a longitudinal section thereof.

The cover or lid a of the shuttle a, instead, as hitherto, of being embedded on its entire length in the shuttle, so as to leave sufiicient space on its outside for the accommodation of the spring and other parts, that are not supposed to project beyond the edges a of the shuttle, according to this invention is at its reduced or pointed end, somewhat bent inwardly, while the part extending between the hinge 70 thereof and the part a, where the bend begins, is even and flush with the edges 07 of the shuttle. The space in the shuttle which in length Specification of Letters Patent.

Application filed January 6, 1913.

Patented Feb. 3, 1914.

Serial No. 740,389.

corresponds to the distance between 71; and i of the cover must be as little as possible obstructed or reduced in order to accommodate the greatest amount of thread. On the other hand the space of the shuttle at the pointed end thereof, that is to say, that part which is located left of the knee formed at 2' can be obstructed or reduced, since it only accommodates little thread and the reduced end of the bobbin (not shown).

The thread braking or tensioning spring- 0, instead, as hitherto, of being an oblong part extending over the entire length of the cover, according to this invention, is a curved and bent member, which is pivoted to the cover by a screw (Z at the left of the knee formed at i. The part c of the spring is curved in a circle the center of which is the rivet e, of the brake control arm 6, adapted to slidably rest thereon. This part 0 extends substantially parallel to and only a very short distance below the edges of the shuttle so as to provide for enough space in which the heads of the screw and rivet d, 6 can rest without projecting beyond the edges a of the shuttle. At the end of the circle opposite that of the screw (2 the spring is bent downwardly as at 0 to extend in close proximity and parallel to the cover a and is somewhat widened as at 0 It will be seen that the brake action on the thread which in well known manner is passed outwardly from the shuttle through the passages f, g, h and which is engaged by the part c of the spring can be controlled, by turning the control arm 6 around its rivet 6. Owing to the circular part 0 of the spring which corresponds to the circular path of the free end of the control arm I), the latter will exercise uniform pressure on the spring, and the control of the latter will be more delicate than with the hitherto used oblong springs, with which the control arm when turned is caused to first contact at the edge, then with the mid dle part, and then again with the edge of the spring.

What I claim and desire to secure by Letters Patent is:

1. In a shuttle, a cover or lid which extends fiush with the lateral edges of the shuttle and at one end is bent inwardly, and a thread braking spring fastened to and extending over said bent part of the cover or lid.

2. In a shuttle, a cover or lid which extends flush with the lateral edges of the shuttle and at one end is bent inwardly, a circularly curved thread braking spring fastened to and extending over said bent part of the cover or lid and a brake control arm slidably resting on said spring.

3. In a shuttle, a cover or lid having an inwardly bent part, a thread braking spring fastened to and extending over said bent part and having a circularly curved part, and a brake control arm pivoted to said cover at a point which forms the center of the curved part of the spring.

4. In a shuttle, a cover having an inwardly bent part, a spring fastened to and extending over said bent part and having a circularly curved part, and adownwardly bent part, a. brake control arm pivoted to the cover at a point which forms the center of said curved part of the spring, said circularly curved part extending a little below the lateral edges of the shuttle and the bent part of the spring extending toward and at its lower end extending parallel to the bent part of the cover or lid.

In testimony whereof I aflix my signature in presence of two witnesses.

ROBERT ZAHN.

Witnesses:

A. C. ROTH, ROBERT H. NIER.

Copies of this patent'may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

